
ASIX ELECTRONICS CORPORATION
3
AX88655AB 5-Port 10/100/1000BASE-T Ethernet Switch
CONFIDENTIAL
CONTENTS
1.0 AX88655AB OVERVIEW.........................................................................................................................................5
1.1 G
ENERAL
D
ESCRIPTION
............................................................................................................................5
1.2 AX88655AB B
LOCK
D
IAGRAM
.............................................................................................5
1.3 P
IN
C
ONNECTION
D
IAGRAM
...................................................................................................................6
2.0 I/O DEFINITION.......................................................................................................................................................7
2.1 RGMII/GMII/MII I
NTERFACE
.............................................................................................................7
2.2 M
ISCELLANEOUS
..........................................................................................................................................9
3.0 FUNCTIONAL DESCRIPTION............................................................................................................................11
3.1 I
NTRODUCTION
............................................................................................................................................11
3.2 P
ACKET
F
ILTERING AND
F
ORWARDING
P
ROCESS
.....................................................................11
3.3 MAC A
DDRESS
R
OUTING
,
L
EARNING AND
A
GING
P
ROCESS
.............................................11
3.4 F
ULL
D
UPLEX
802.3
X
F
LOW
C
ONTROL
.........................................................................................11
3.5 H
ALF
D
UPLEX
B
ACK
P
RESSURE
C
ONTROL
..................................................................................11
3.6 MII P
OLLING
................................................................................................................................................11
3.7 P
ORT
-B
ASED
Q
O
S: P
ORT
-P
AIR
.........................................................................................................11
3.8 VLAN
AND
B
ROADCAST
S
TORMING
P
REVENTION
................................................................12
3.9 S
ECURITY
O
PERATION
- P
ORT
SA
RESTRICTION
.....................................................................12
3.10 I
NGRESS
/E
GRESS
B
ANDWIDTH
C
ONTROL
S
CHEME
.............................................................12
3.11 P
ORT
M
IRRORING
....................................................................................................................................12
4.0 REGISTER DESCRIPTIONS................................................................................................................................13
5.0 ELECTRICAL SPECIFICATION AND TIMING...............................................................................................21
5.1 A
BSOLUTE
M
AXIMUM
R
ATINGS
........................................................................................................21
5.2 G
ENERAL
O
PERATION
C
ONDITIONS
.................................................................................................21
5.3 DC C
HARACTERISTICS
............................................................................................................................21
5.4 AC
SPECIFICATIONS
..................................................................................................................................22
6.0 PACKAGE INFORMATION.................................................................................................................................27
APPENDIX A: SYSTEM APPLICATIONS ...............................................................................................................30
APPENDIX B: DESIGN NOTE....................................................................................................................................31
APPENDIX C: WEIGHT SETTING FOR QOS ........................................................................................................32
APPENDIX D: RESOLUTION INGRESS/EGRESS FOR BANDWIDTH CONTROL.......................................32